Enclosures of this kind are among the most common yet most varied features of the Irish landscape; the term covers everything from the circular earthen banks of a prehistoric ringfort, which would have enclosed a family farmstead, to the stone-built boundaries of early medieval settlements. Without further detail, the category alone is enough to suggest that something deliberate and human-made once defined this particular patch of ground.

Garhawnagh is a small townland in Mayo, a county whose landscape holds an extraordinary density of archaeological remains, many of them still incompletely studied. The west of Ireland was subject to significant land clearance and abandonment during and after the nineteenth century, and features that might have been levelled or built over elsewhere sometimes survived simply because the ground was left alone. An enclosure in such a setting could date to almost any period from the Bronze Age onward, and the specific character of its banks, ditches, or stonework would be what distinguishes a field boundary from something with a more deliberate social or defensive function.